xnu-792.25.20.tar.gz

[apple/xnu.git] / osfmk / kern / page_decrypt.c

diff --git a/osfmk/kern/page_decrypt.c b/osfmk/kern/page_decrypt.c
new file mode 100644 (file)
index 0000000..c397ab1
--- /dev/null
+++ b/osfmk/kern/page_decrypt.c
@@ -0,0 +1,74 @@
+/*
+ * Copyright (c) 2005 Apple Computer, Inc. All rights reserved.
+ *
+ * @APPLE_LICENSE_HEADER_START@
+ * 
+ * The contents of this file constitute Original Code as defined in and
+ * are subject to the Apple Public Source License Version 1.1 (the
+ * "License").  You may not use this file except in compliance with the
+ * License.  Please obtain a copy of the License at
+ * http://www.apple.com/publicsource and read it before using this file.
+ * 
+ * This Original Code and all software distributed under the License are
+ * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+ * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+ * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
+ * License for the specific language governing rights and limitations
+ * under the License.
+ * 
+ * @APPLE_LICENSE_HEADER_END@
+ */
+
+
+#include <kern/page_decrypt.h>
+#include <kern/task.h>
+#include <machine/commpage.h>
+
+/*#include <sys/kernel.h> */
+extern int hz;                 /* system clock's frequency */
+extern void*   dsmos_blobs[];
+extern int     dsmos_blob_count;
+
+/* #include <sys/proc.h> */
+extern int     tsleep(void *chan, int pri, const char *wmesg, int timo);
+
+/* #include <sys/param.h> */
+#define        PZERO   22              /* No longer magic, shouldn't be here.  XXX */
+
+static int _dsmos_wait_for_callback(const void*,void*);
+
+static dsmos_page_transform_hook_t dsmos_hook = _dsmos_wait_for_callback;
+
+int
+_dsmos_wait_for_callback(const void* from, void *to)
+{
+/*     printf("%s\n", __FUNCTION__); */
+       while ( (dsmos_hook == NULL) || (dsmos_hook == _dsmos_wait_for_callback) )
+               tsleep(&dsmos_hook, PZERO, "dsmos", hz / 10);
+
+       return (*dsmos_hook) (from, to);
+}
+
+void
+dsmos_page_transform_hook(dsmos_page_transform_hook_t hook,
+                         void (*commpage_setup_dsmos_blob)(void**, int))
+{
+#ifdef i386
+       /* finish initializing the commpage here */
+       (*commpage_setup_dsmos_blob)(dsmos_blobs, dsmos_blob_count);
+#endif
+
+       /* set the hook now - new callers will run with it */
+       dsmos_hook = hook;
+}
+
+int
+dsmos_page_transform(const void* from, void* to)
+{
+/*     printf("%s\n", __FUNCTION__); */
+       if (dsmos_hook == NULL)
+               return KERN_FAILURE;
+       return (*dsmos_hook) (from, to);
+}
+